This gem helps to create wizard like interfaces in terminal applications, has support for nesting and value validation

MiniTest matchers for ActiveModel::Validations

Interface and protocol for validating and validation discovery

DataMapper plugin providing better error messages handling.

A captcha verification approach for Rails apps, directly integrated into ActiveRecord’s validation mechanism and providing helpers for ActionController and ActionView.

Encapsulates FoxyCart SSO, datafeed, and cart validation protocols

Combine email validation and transformations to produce canonical email addresses.

ActiveModel email validation. Checks MX records, sub address, regex, whitelisted and blacklisted check

Allows defining structure of data and perform validation against it using json-schema

Optout helps you write code that will call exec() and system() like functions. It allows you to map hash keys to command line arguments and define validation rules that must be met before the command line options are created.

== DESCRIPTION: GOSS is a tool for validating a server's configuration. This kitchen plugin adds Goss support as a validation to test-kitchen. == FEATURES:

Rack parameter validation and type coercion.

Makes ActiveRecord defer/postpone saving the records you add to an habtm (has_and_belongs_to_many) or has_many association until you call model.save, allowing validation in the style of normal attributes. Additionally you can check inside before_save ...

A validation library for ActiveRecord models that allows introspection (User.name_is_required?) and supports database normalization (aka "form input cleaning").

xlsx spreadsheet generation with charts, images, automated column width, customizable styles and full schema validation. Axlsx helps you create beautiful Office Open XML Spreadsheet documents ( Excel, Google Spreadsheets, Numbers, LibreOffice) without having to understand the entire ECMA spec...

Email Detected is a simple tool for verifying an email address exists. It's free and quite easy to use :smile: .Many times as developers we were putting validation statements for checking email addresses format. This gem will complete your existing setups with validator that actually connects wit...

A managing interface layer for handling the creation and validation of JWTs

AddressValidate is a ruby wrapper for integrating with the USPS address validation api.

Full-featured type system for any ruby project. Supports custom type definition, type validation, type casting and type categorizing. Provides a set of commonly used type categories and general purpose types. Has a flexible and simplest type definition toolchain.

Gem includes validations, card brand detection method, etc.